Also consider Sennheiser PXC 550. I have the Bose 35s, Sony 1000 original and XM2 and the Sennheisers are my favorite. The noise cancelling isn't as good as the others, but on a plane with music playing it's similar to the Bose. The sound beats them all--just much more alive and detailed. The XM2s are a close 2nd, but just are so much heavier and don't sound as good. They can only connect to 1 device at a time, which also is annoying. The Bose and Senns can connect to 2 at a time. The noise cancelling on both Sonys is quite obviously much better than the Bose in every test I've done. If noise cancelling is most important, just get the new XM3s that are on Amazon now. After enjoying better headphones for a while, when I try the Bose, I just can't understand why anyone would choose them at this point. The sound is by far the worst of the 4, and the app doesn't customize them.